13 #include <tracking/trackFindingVXD/filterMap/filterFramework/SelectionVariable.h>
14 #include <tracking/trackFindingVXD/filterMap/threeHitVariables/CircleCenterXY.h>
15 #include <tracking/trackFindingVXD/filterMap/threeHitVariables/CircleRadius.h>
16 #include <tracking/trackFindingVXD/filterMap/twoHitVariables/CosDirectionXY.h>
17 #include <framework/geometry/B2Vector3.h>
20 #define DELTASLOPEZOVERS_NAME DeltaSlopeZoverS
32 template <
typename Po
intType >
40 static double value(
const PointType& outerHit,
const PointType& centerHit,
const PointType& innerHit)
43 B2Vector3D cCenter = CircleCenterXY<PointType>::value(outerHit, centerHit, innerHit);
44 double circleRadius = CircleRadius<PointType>::calcAvgDistanceXY(outerHit, centerHit, innerHit, cCenter);
45 B2Vector3D vecOuter2cC((outerHit.X() - cCenter.
X()),
46 (outerHit.Y() - cCenter.
Y()),
47 (outerHit.Z() - cCenter.
Z()));
48 B2Vector3D vecCenter2cC((centerHit.X() - cCenter.
X()),
49 (centerHit.Y() - cCenter.
Y()),
50 (centerHit.Z() - cCenter.
Z()));
51 B2Vector3D vecInner2cC((innerHit.X() - cCenter.
X()),
52 (innerHit.Y() - cCenter.
Y()),
53 (innerHit.Z() - cCenter.
Z()));
57 double alfaOCr = acos(CosDirectionXY<B2Vector3D>::value(vecOuter2cC, vecCenter2cC)) * circleRadius ;
58 double alfaCIr = acos(CosDirectionXY<B2Vector3D>::value(vecCenter2cC, vecInner2cC)) * circleRadius ;
61 double result = (asin(
double(outerHit.Z() - centerHit.Z()) / alfaOCr)) - asin(
double(centerHit.Z() - innerHit.Z()) / alfaCIr);
63 return (std::isnan(result) || std::isinf(result)) ?
double(0) : result;